Machine for grooving bit blanks



`(No Modemy J. SWAN.

No, 381,092:l

MACHINE POR GROWING BIH.1 BI..\NK'S.l K Y flatented Apr. 10. 1888.22, ny f s sheetsvsheet-zQ j'.

'I EN Il0 .lfu'Y IW INI" .NIW

(No Modeln.) 4 I 3 Sheets-Sheet 3. l J. SWAN.. i i f MAGHINE- FORGROOVING BIT BLANKS.l

10,331,092, aten-@MPL10,1388;

v lUNITED SrATEs PATENT GFFICE.;

JAMES swAN, or snYMoR, CONNECTICUT.

` v MACHINE FCR 'CROovlNc Bi-TFBLANKS.

SPECIFICATION formingfpart of Letters Patent ].\l'cz.3 81r,092`l datedApril 10,1888. Y l Application filed January 26, 1888. i Serial No.261,973.` (No model.) 4 Y To all it may concern.-

Beit known that I, JAMES SWAN, a citizen of the United States,'residingat` Seymour, inthe county of New Haven and State of Connecticut, haveinvented certain new and useful Improvements in Machines for GroovingBit-Blanks; and I do hereby declare the followi y ing to be a full,clear, and exactdescription of theinvention, such aswill enable othersskilled 1c kin the art to which it appertains to make and v use thesame.' y f My invention has for its object to produce a machineof vthisclass which shall be simple in construction yand adjustment, durable,and

' I 5 which will produce the bestof Work ata greatlyincreased rate-ofspeed.. f

With these endsin view I havedevised the novel construction of which thefollowing de:

scription, in connection' with-the accompanyi zo ing drawings, is aspecification,- numbers being ...used to denote the several parts. y

Figure 1 is a plan view ofthe machine complete; Fig. 2,r arearjelevation thereof; Fig. 3, an elevation of a cutter -and hingedjournal- Y box detached; Fig. 4, an inverted. plan viewy correspondingwith Fig. 3 Fig.. 5, a .cross-sec'` tion on the line fr a; in Fig. 3,looking 'toward the 1eft5andFig. 6 is a view of a double-ended blank asgrooved by the machine. 1 i

3o 1 denotes the bed of the machine, a portionof which is raised abovethe other portion,` formingV upper and lower planes, the purpose ofwhich w11l presently be clearly. understood, and 2 denotes the legs bywhich it is supported.

3-5 The bed is preferably made 'circular in-form, l.

as shownin the drawings, and is provided at l its. frontend with anextension, 3,l which may be made integral therewith or cast separatelyandy attached thereto.

4o y4 denotes the blank to be operated upon,

which is carried by a chuck, 5, at the. end of a-scr'ew, 6, passingthrough a stationary nut or box, 7, at the forward end of the extension.

In the present instance I have shown the -`blanks Vas fed forward bya'hand-wheel, 8, al-

though in practice .I contemplate making the feed automatic. As theblank is fed forward it passes'into a guide, 9, upon a plate, 10,

o which is adjustably and detachably secured to 5o extension 3, asshown.

11 is astop carried by plate 10, which is shown in dotted lines YinvFig.,1, to limit the forward movement of the chuck when the blank has beenthrown far enough forward so thatthev cutters sh all have made groovesof the required length therein.. y

The .rear end of Ythe guide is made ,coneshaped and is cut .awayobliquely, 'asindicated in Fig. 2, to enable the cutters tooperate uponthe blank. It should be .understood that the .blank fits closely enoughin the guide' so' as to he held against any lateral movementpduring-adapted to swing over toward the right, as

the operation of thecutters. A diffcrentsi'zed guide yisof course usedfor .each-sized ,blank that is operated upon. suitable construction maybe used, it/jbeing simply lrequired thaty the chuck Vshall actquickly,preferably by a screw, 12, and shall hold theblank firmlylWithout marring it.'Y In practice one endof theblank'is fed forward tothe cutters' andv operated upon, then the Any lathe-chuckrfof groovedend is insertedin the chuckand they A opposite end grooved.'v Theblankis then cut Vin two, and the other processes of forming the completedauger, bit, or gimlet are proceeded '13 denotes the cutters,which arecarriedr by y i shafts 14, journaled in boxes 15.

16 and 17 denote,- respectlvely,fnutsifand endwise adjustmentis given tosaid'shafts, itA

being of course understood that thefcutters are'v changed for each sizeof blank and thatthe adjustment of said cutters 'must be absolutelyaccurate.

shaft. As the cutters operate upon opposite sides of the blank, .it willofA course' be understood thatoneeof the belts musthe crossed, ,so i.

that the cutters vwill rotate. in opposite directions'. In order that IAmay causeth'ecutters tocut the grooves at any desired pitch,"and inorderthat they may bethrown from'their oper` ativeposition theinstantgthe groovng oper! Y ation is completed, Ihinge the outer'ends ofthe boxes 15, in` which 'the cutter-shafts`are f .journaled,to `blocks19, having tongues20,

VVloo radapted to`slid'e in grooves 21 at the opposite Y i edges of` thebed, -as vclearlyshowninl Fig.`2. I..

check-nuts on shafts 14, whereby thejdesired 1 5 bolts which passthrough each block are locsened, the blocks adjusted, and the bolts arethen tightened up again. In order to hold the cutters in operativeposition in use, .I preferably employ weights 23 and 24. Veight 23 is ofthe upper cutter-shaft box, its action being simply to draw the uppercutter down to its operative position and hold it there. Weight 24-issuspended from the outer end of a lever, 26, which is pivoted to one ofthe legs, and its inner end connected to a rod, 27, the upper end ofwhich bears against the under side of the lower cutter-shaft box actingto raise said lower cutter to its operative position and hold it there.The lower ends of rods 25 and 27 are connected by means of eyebolts 28to alever, 29, pivoted midway between them to a rigid rod, 30, dependingfrom the bed of the machine.

z5 31 denotes a feedlever pivoted to a bracket secured to one of thelegs. The forward end of this lever bears upon the underside of lever29, so that when the foot-lever is pressed down its forward end israised, raising one end of lever 29, which carries weight 23 upward, andby means of rod 25 raises the upper cuttershaft box and carries thecutter out of operative position. It is of course apparent that theopposite end of lever 29 will 'be moved downward, which will draw rod 27downward against` the power of weight 24 and will allow the lowercutter-shaft box to drop downward slightly, carrying thelower cutter outof operative position. The depth of the groove cut in the blank isregulated by means of setscrews 32, there being two set-screws providedfor each cuttereshaft box, as clearly shown in Fig. 1. The set-screwsfor adjusting the upper cutter-shaft and cutter pass through lugs 33upon the box and their points bear against the bed of the machine,thereby limiting the downward movement of the box, shaft, and cutter.The set-screws for adjusting the lower cutter pass through a bracket,34, and their go ends bear against lugs 35 upon the sides of the lowercutter-shaft box.

36 denotes plates upon the bed,each ofwhich is provided with aset-screw, 37, the point vof which bears against one of the cutter-shaft,5 boxes and acts to overcome any tendency of the boxes to spring out ofposition in use,and at the same time preventing any strain uponv thehinged connections of the boxes.

In 'use the blank is placed in the chuck, as

'o already described, and is fed forward through the guide to thecutters either 'automatically or by hand, as shown. The instant thechuck comes in contact with stop ll the operator places his foot onfoot-lever 31 and throws both 5 of the cutters out of operativeposition, as already described. The chuck and blank are then withdrawn,the blank is changed end for carried by a rod, 25, pivoted to the lowerside v end in the chuck, or a new blankis inserted, and the chuck isready to be fed forward again, as before. The instant the operators footis removed from foot-lever 3l the cutters dropback to their operativeposition. It will be seen that no clutch or belt-shifting mechanism isrequired, there being no necessity for stopping the cutters until achange is made in the class of work.

It will of course be understood that the various detailsof constructionmay be greatly changed without departing in the slightest from theprinciples of my invention.

1. The combination, with a chuck for carrying the blank and a guide toreceive the blank, of groovingcutters on opposite sides of the guide,shafts therefor, and hinged boxes for said shafts which permit thecutters to be thrown out of operative position without stopping theirmovement.

2. In a grooving-machine,t11e combination, with a guide for the blank,of cutters on opposite sides thereof and arranged oblique] y thereto,shafts for said cutters, and hinged boxes for the shafts.

3. A machine for grooving bit-blanks, consisting, essentially,of a chuckfor carrying the blanks, having axial rotation as it moves forward, aguide to steady the blanks, cutters which groove the blanks, and hingedjournalboxes for said cutters,which permit them to be moved into and outof operative position.

4. In a machine for grooving bit-blanks, the combination, with thecutters and shafts therefor, of boxesin which said shafts are journaled,and sliding blocks to which said boxes are hinged, whereby the pitch atwhich the grooves are cut may be regulated.

5. A circular table having grooves in its opposite edges and blocksadjustable in said grooves,in combination with grooving-cutters, shaftstherefor, and boxes for said shafts,which are hinged to said blocks, asand for the purpose set forth.

6. The combination, with the cutters, their shafts, and hinged boxestherefor, of weights acting to hold the cutters in operative position,and rods, levers, and a foot-lever, substantially as described, wherebythe power of the weights may be overcome andthe cutters thrown out ofoperative position. 7. The bed, extension, chuck, and cutters,substantially as described, in combination with an adjustable guidesecured to the extension and a stop carried by the guide, which limitsthe forward movement of the chuck, as and for the purpose set forth.

8. The combination, with the chuck, guide, and cutters, of hinged boxesin which the cutter-shafts are journaled, means, substantially asdescribed, for holding the cutters in operative position, and set-screws32, whereby the depth of the cut may be regulated. Y

9. The circular bed having upper and lower planes and grooves 19 in theedges thereof, in combination with upper and lower cutters,

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shafts and boxes therefonand blocks adj ustf` boxes therefor hinged tosaid blocks, lugs upon the. upper box, and set-screws passing throughthem and engaging the bed to regulate the depth of cut ofthe uppercutter, and a bracket, 34, having set-screws passing through it andengaging lugs upon the lower box, whereby the depth of cut kof the lowercutter is'regulated. f t

11. The upper and lower cutters, shafts, and boxes therefor, incombination with a'rod and weight hinged to the upper box, a vrodcontrolled by a weight bearing against the lower box, a pivoted lever,29, to which both'rods are 2oy *y Y pivoted, and a foot-lever adapted toengagelever 29 to raise the rod pivoted to the .upper boxH and lowerthev rod` bearing against thek under box, whereby-the cutters are thrownlout of operative position.

12. The bed, sliding blocks, cutters, shafts,l

and hinged boxes, in eombinationwith plates P ventvlateral movement ofthe cutters vin use,

In testimony whereof I affix my presence of two witnesses.

Witnesses;

' A. M. WoosrER,

36 and screws 37, `engaging` the boxes to. pre-- i signature inf 3oJAMES SWAN. i f i

